With the aim of optimal system design, the article discusses the model classification, the modeling method and the system design process on the basis of general conception of engineering model.
从工程模型的一般概念入手，以系统优化设计为目标，重点讨论了模型的分类、建模方法和系统的设计过程。
The initial conception on general structure of information system for the integrative and intellectual design are also put forward.
提出了“铁路勘测设计一体化”信息系统总体结构的初步构想。
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